心肌第一通 perfusion 磁共振成像:一个多中心剂量范围研究
S D Wolff1, J Schwitter, R Coulden
1Cardiovascular Research Foundation and Lenox Hill Hospital, New York, NY, USA. swolff@mrict.com
Circulation
|August 4, 2004
概括
低剂量的gadopentetate dimeglumine (0.05 mmol/kg) 是有效的诊断阻塞性冠状动脉疾病使用第一通 perfusion MRI. 这种MRI技术可以准确地识别患有冠状动脉疾病的患者.
科学领域:
- 心血管成像 - 心血管成像
- 放射学 放射学是一门学科.
- 医学诊断 医学诊断 医学诊断
背景情况:
- 磁共振成像 (MRI) 可以检测阻塞性冠状动脉疾病.
- 在药理学诱导的心肌高血压期间使用第一通透对比玻尿酸成像.
- 这项研究旨在为此目的找到gadopentetate dimeglumine的最小有效剂量.
研究的目的:
- 确定 gadopentetate dimeglumine 的最小有效剂量.
- 用MRI评估检测阻塞性冠状动脉疾病的疗效.
主要方法:
- 一项多中心,剂量范围研究,涉及99名患者.
- 患者接受了0.05,0.10或0.15毫摩尔/千克的gadopentetate和dimeglumine.
- 进行了第一通透输液MRI,并没有腺诱导的高血压;结果与冠状动脉血管学相比较.
主要成果:
- 低剂量 (0.05 mmol/kg) 表示接收器操作曲线下的面积为0.90.
- 低剂量的平均灵敏度,特异性和准确性分别为93%,75%和85%.
- 发现低剂量至少与高剂量一样有效.
结论:
- 第一通透输液MRI是识别阻塞性冠状动脉疾病的安全和准确方法.
- 对于有效的诊断,0.05 mmol/kg的gadopentetate dimeglumine剂量就足够了.
- 这一发现支持在心脏MRI中使用较低剂量的对比剂.
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